COMPRESSOR SYSTEM FOR A PUNCTURE REPAIR KIT, PUNCTURE REPAIR KIT HAVING SUCH A COMPRESSOR SYSTEM, AND METHOD FOR SEALING A VEHICLE TYRE WITH SUCH A COMPRESSOR SYSTEM

Abstract

A compressor system for a puncture repair kit, in which a supply pressure of compressed air is controlled to a specified pressure Pp or less without the use of a relief valve, having a motor, a piston, which is driven by the motor via a crank mechanism and has a cylinder component with a cylinder main body having a pump chamber, in which a piston is movable between a bottom dead center and a top dead center and air is compressed, and a receiving chamber for receiving the compressed air compressed in the pump chamber through an air discharge valve. The cylinder main body is elastically deformable as the pressure increases, the cylinder main body being deformable to such an extent that the compression volume V2 of the cylinder fulfills the following expression (a) 0.3?V1?P0/(PP?P0)=<V2<0.8?V1?P0/(PP?P0) (a), where V1 is a swept volume which is a cylinder volume while the piston moves from the bottom dead center to the top dead center, V2 is a compression volume which is a cylinder volume when the piston is located at the top dead center, and P0 is an air pressure.

Claims

1. A compressor system for a puncture repair kit, in which a supply pressure of compressed air is controlled to a specified pressure Pp or less without the use of a relief valve, comprising a motor, a piston, which is driven by the motor via a crank mechanism and has a cylinder component with a cylinder main body having a pump chamber, in which a piston is movable between a bottom dead center and a top dead center and air is compressed, and a receiving chamber for receiving the compressed air compressed in the pump chamber through an air discharge valve, wherein the cylinder main body is elastically deformable as pressure increases, the cylinder main body being deformable to such an extent that a compression volume V2 of the cylinder fulfills the following expression (a) $\begin{array}{cc}0.3?V1?P0/\left(\mathrm{PP}-P0\right)=<V2<0.8?V1?P0/\left(\mathrm{PP}-P0\right),& \left(a\right)\end{array}$ where V1 is a swept volume which is a cylinder volume while the piston moves from the bottom dead center to the top dead center, V2 is a compression volume which is a cylinder volume when the piston is located at the top dead center, and P0 is an air pressure.

2. The compressor system as claimed in claim 1, wherein the cylinder main body comprises at least one plastic.

3. The compressor system as claimed in claim 2, wherein the wall of the cylinder main body has a thickness in the range of 1 to 3 mm.

4. The compressor system as claimed in claim 1, wherein a wall of the cylinder main body is elastically deformable.

5. The compressor system as claimed in claim 1, wherein the cylinder main body wall is formed from a material that has a bending modulus in a range from 0.5 to 10 GPa.

6. A puncture repair kit comprising the compressor system according to claim 1 and a sealant device, wherein the sealant device has a sealant for sealing a vehicle tire.

7. The puncture repair kit as claimed in claim 6, wherein the compressor system is connectable to the sealant device.

8. A method for sealing a vehicle tire using the compressor system according to claim 6, comprising at least the following steps: (i) building up a positive pressure by means of the piston in the compressor system, wherein the compression volume V2 of the cylinder fulfills the expression (a), and ii) delivering a sealant into a vehicle tire by means of a positive pressure built up in the compressor system.

9. The compressor system as claimed in claim 1, wherein the cylinder main body comprises polyamide.

10. The compressor system as claimed in any one of the preceding claims, wherein the cylinder main body wall is formed from a material that has a bending modulus in a range from 1 to 1.5 GPa.

11. The method according to claim 8, wherein the cylinder main body comprises at least one plastic.

12. The method according to claim 8, wherein the cylinder main body comprises polyamide.

13. The method according to claim 10, wherein a wall of the cylinder main body has a thickness in the range of 1 to 3 mm.

14. The method according to claim 8, wherein the cylinder main body wall is formed from a material that has a bending modulus in a range from 0.5 to 10 GPa.

15. The method according to claim 8, wherein the cylinder main body wall is formed from a material that has a bending modulus in a range from 1 to 1.5 GPa.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Further details and advantages of the present invention will become apparent from the following description of the exemplary embodiments in conjunction with the drawings, in which

[0035] FIG. 1a shows a cross-sectional view of a cylinder main body with a piston at the bottom dead center, and

[0036] FIG. 1b shows a cross-sectional view of a cylinder main body with a piston at the top dead center.

DETAILED DESCRIPTION

[0037] FIG. 1a shows a cylinder main body 1 which is illustrated in a cross-sectional view with a piston 2 and an air inlet opening 3 and an air outlet opening 4, wherein such a construction is used in a compressor and/or puncture repair kit according to the invention. The two side walls 5 of the cylinder main body 1 are elastically deformable as the pressure increases. In FIG. 1a, the piston 2 is located at the bottom dead center, with the side walls 5 of the cylinder main body 1 not being deformed. As the pressure increases, the side walls 5 in the region of the pump chamber 6 deform outward until the piston 2 has reached the top dead center (FIG. 1b). The process of generating the maximum pressure and returning again to the bottom dead center of the piston 2 is reversible.

LIST OF REFERENCE SIGNS

[0038] 1 Cylinder main body [0039] 2 Piston [0040] 3 Air inlet opening [0041] 4 Air outlet opening [0042] 5 Side walls [0043] 6 Pump chamber